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Ahmad, Shahab
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Publications (9/9 displayed)
- 2023Strong Photocurrent from Solution‐Processed Ruddlesden–Popper 2D Perovskite–MoS<sub>2</sub> Hybrid Heterojunctionscitations
- 2019Triple-Cation-Based Perovskite Photocathodes with AZO Protective Layer for Hydrogen Production Applications.
- 2018Lead-Free Perovskite Semiconductors Based on Germanium-Tin Solid Solutions:Structural and Optoelectronic Propertiescitations
- 2018Carbon nanotube conductive additives for improved electrical and mechanical properties of flexible battery electrodescitations
- 2018Lead-Free Perovskite Semiconductors Based on Germanium-Tin Solid Solutionscitations
- 2015Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets
- 2015Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheetscitations
- 2015Strong photocurrent from 2D excitons in solution-processed stacked perovskite semiconductor sheets
- 2014In situ intercalation dynamics in inorganic-organic layered perovskite thin films.
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document
Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets
Abstract
Room-temperature photocurrent measurements in two-dimensional (2D) inorganic–organic perovskite devices reveal that excitons strongly contribute to the photocurrents despite possessing binding energies over 10 times larger than the thermal energies. The p-type (C6H9C2H4NH3)2PbI4 liberates photocarriers at metallic Schottky aluminum contacts, but incorporating electron- and hole-transport layers enhances the extracted photocurrents by 100-fold. A further 10-fold gain is found when TiO2 nanoparticles are directly integrated into the perovskite layers, although the 2D exciton semiconducting layers are not significantly disrupted. These results show that strong excitonic materials may be useful as photovoltaic materials despite high exciton binding energies and suggest mechanisms to better understand the photovoltaic properties of the related three-dimensional perovskites.